71741991 has 16 divisors (see below), whose sum is σ = 101189376. Its totient is φ = 45118656.

The previous prime is 71741987. The next prime is 71741993. The reversal of 71741991 is 19914717.

It is not a de Polignac number, because 71741991 - 2² = 71741987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71741993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2085 + ... + 12158.

It is an arithmetic number, because the mean of its divisors is an integer number (6324336).

Almost surely, 2^71741991 is an apocalyptic number.

71741991 is a deficient number, since it is larger than the sum of its proper divisors (29447385).

71741991 is a wasteful number, since it uses less digits than its factorization.

71741991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14342.

The product of its digits is 15876, while the sum is 39.

The square root of 71741991 is about 8470.0644035332. The cubic root of 71741991 is about 415.5192436070.

The spelling of 71741991 in words is "seventy-one million, seven hundred forty-one thousand, nine hundred ninety-one".